Aqueous foams stabilized with silica nanoparticle and alpha olefin sulfonates surfactant

Abstract

Carbon dioxide (CO2) foams have been introduced to improve mobility of CO2 in CO2 flooding. However, using surfactant alone to stabilize CO2 foam has potential weaknesses such as high surfactant retention in porous media and the foam is thermodynamically unstable for a long-term. Nanoparticle has been an alternative in stabilizing CO2 foam longer. This study aims to analyze CO2 foam stability at varying concentrations of surfactant, silica nanoparticle (SNP) and brine. The additions of SNP in anionic surfactant of alpha olefin sulfonates (AOS)-water and in AOS-brine towards foam stability were demonstrated in this study. CO2 foam stability was measured through the foam height observation and bubble size analysis. The performance of SNP and AOS suspensions in stabilizing foam were observed at different concentrations of AOS (0.1, 0.3 and 0.5 wt%), SNP (0.1, 0.3 and 0.5 wt%) and brine (0.1, 1 and 5 wt%). The results revealed that the CO2 foams were most stable at 0.3 wt% SNP suspension in 0.5 wt% AOS-water. It was found that the most stable foams formed at concentration of 1 wt% of brine. Smaller and uniform bubble size has been produced at 0.3 wt% SNP in 0.5 wt% AOS solution. Thus, concentrations of surfactant, SNP and brine have significant effects on CO2 foam stability.

Minimizing Adsorption of Anionic Surfactant in Alkaline-Surfactant-Polymer System: Effects of pH and Surfactant Concentration

“…Polymer is known as the viscosifying agent, which increases the viscosity of the solution and improves the mobility. The same mechanisms provided by foam flooding, an EOR process utilizing surfactant solution in carbon dioxide injection for foam generation, which has been widely researched on the mobility reduction [16], as well as the improvement of foam stability with the addition of nanoparticles [17][18][19]. However, there are still several issues in the mechanism of surfactant adsorption in ASP formulation, which are poorly understood and much need for further studies.…”

Properties of Biodegradable Polymer from Terrestrial Mushroom for Potential Enhanced Oil Recovery

“…Besides that, gelled polymer technology could be applied to seal high permeability zones and fractures, resulting in improving sweep efficiency and oil recovery [5]. Another chemical EOR process, which could provide mobility control, is foam flooding, involving the investigation of mobility [6], as well as the improvement of foam stability with the addition of nanoparticles [7][8][9][10][11]. These EOR processes could be monitored using a real-time approach of streaming potential measurement using electrodes permanently installed downhole, which is the potential to monitor alkaline-surfactant-polymer (ASP) flooding [12][13].…”